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Tom_Lauwereins_'s avatar
Tom_Lauwereins_
Icon for Nimbostratus rankNimbostratus
Feb 10, 2012

peristence based on HTTP header field

Hi,

 

 

I'm looking for a way to persist http requests based on the http header field.

 

How to do this via an iRule or is there a more easy way to handle the traffic always to the same pool memeber?

 

 

Kind Regards,

 

 

Tom

 

application delivery
dev
devops
iRules
  • naladar_65658's avatar
    naladar_65658
    Icon for Altostratus rankAltostratus
    Feb 10, 2012
    I have a few iRules that are setup which will parse the incoming URL, figure out which pool it should go to based off the URI and then puts a cookie into the header for persistence. Is that what you have in mind?
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Feb 10, 2012
    in case http header value is coming from client side and always shown in all request.

    e.g. 

    [root@ve1023:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve1023:Active] config  b pool foo list
pool foo {
   members {
      200.200.200.101:80 {}
      200.200.200.102:80 {}
   }
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if {[HTTP::header exists "Look-at-Me"]} {
      persist uie [HTTP::header "Look-at-Me"]
   }
}
}

[root@ve1023:Active] config  b persist show all
No Persistence Table Entries were found.

[root@ve1023:Active] config  curl -I http://172.28.19.79 -H "Look-at-Me: helloworld"
HTTP/1.1 200 OK
Date: Sat, 11 Feb 2012 00:19:14 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 11 Nov 2011 14:48:14 GMT
ETag: "4183e4-3e-9c564780"
Accept-Ranges: bytes
Content-Length: 62
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  b persist show all
PERSISTENT CONNECTIONS
|     Mode universal   Value helloworld
|        virtual 172.28.19.79:80   node 200.200.200.101:80   age 2sec

[root@ve1023:Active] config  curl -I http://172.28.19.79 -H "Look-at-Me: 12345"
HTTP/1.1 200 OK
Date: Sat, 11 Feb 2012 00:15:00 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 08 Nov 2011 12:26:29 GMT
ETag: "4183f1-30-47e02740"
Accept-Ranges: bytes
Content-Length: 48
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  b persist show all
PERSISTENT CONNECTIONS
|     Mode universal   Value helloworld
|        virtual 172.28.19.79:80   node 200.200.200.101:80   age 23sec
|     Mode universal   Value 12345
|        virtual 172.28.19.79:80   node 200.200.200.102:80   age 3sec